Differential gearing



Patented Apr. 3, 1923.

U HT ED if? JOHN A. HAZELTON, or BALTIMORE, MARYLAND.

T 0 all whom it may concern.'

Beit known kthat LJoriN A. HAzELToN, a citizen of the United States, residing at Baltimore, Maryland, haveV invented a certain new and useful Improvement in Dif-v tion of said ordinary differential, which is. failure to comply with the requirement unless both wheels have sufficient frictional en,-`

gagement with the ground, commonly known as traction, in orderto enable the car to advance. As is well known, when one of the driven wheels loses its traction, owing, for

example, to itsresting on a slippery sur-y face, and the power of the motor is applied to t-he wheel-driving shafts through the differential, the effect is to spin the wheel having insu-flicient traction while the other wheel remains stationary, the tendency being to rotate the latter backwardly.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawing: Figure 1 is a longitudinal section through my improved diiferential; Fig. 2, a cross section of the same; and, Fig. 3, a section through the driving casing. V

The driving satellite pinions, l, are carried on studs, 5, of the spider, 2, instead of being carried, as has heretofore been the custom, on studs secured inthe driving` case ing. The studs 5, of the spider, 'engage in holes 6, in the casing, 7, with a small amount of play or lost motion, as shown. Between the faces of eachv adjacent pair of pinions, l, is a driving lug, t, integral with the casing, 7, which is driven in the usual way by the large bevel gear, 8, or in any other suitable manner. Thev driving lugs, 4, are tapered, as shown in Fig. 2,

DIFFERENTIAL GEARING.

Applicationled March 7, 1922. Serial No. l541,713.

and have flat plane surfaces which' tween the adjacent bevel pinions,and bearV against the inside edges of two adjacent teeth thereof, thus transmitting the rotation of thecasing to the spider through presf' sureapplied lto the Vperipheries of the vpin-' `4v ions, and, through them, to the-bevel gears 9a, 9a, on the ends ofthe two-wheel-drivingshafts 9, 9.' The spaces between any two adjacent driving lugs, 4,'are just' suflicient-A to allow the'pinions, l, to rotate, when'tliel spider studs are in the centre of the openings in the casing, asfshown in Fig. 2.

By this,construc'tioinfthe spinning ofthe wheels 'is prevented, for the reason that uniform driving force is maintained on all l the driving pinions, 'under any andy all con'- u ditions, while the outer wheel `on a curve eX- erts force enough to rotate the pinionssufficiently to accommodate its greater speed, in other words, either. wheel even when tion.

cure by Letters Patent:

1. A, diferential gear, comprising bevel gears, secured on the ends of the halves loftacan overrun' when necessary. To describe vthe result ob?. tained .fin another way. I obtain. apositive. drive of eitherL wheel, forwardor backward, f

theotherwheel yhas lost its trac- 'l dividedr shaft; bevel pinionsineshing with said gears; a spider Vcarrying said pinions;

a driving casing, havinga lost motion-con toothed faces of said pinions..

ative angular movement; satellite pinions,

nection with said spider; and v'driving lugs,j. carriedv by rsaid "casing, and -acting on ther p f carried by said spider; wheel driving shafts; j

gears on the said shafts, meshing with said pinions; and lugs on theinside of the casing,

fitting between each adjacent pair of pinions, and actingto transmit the power ldirectly thereto.`

' JoHNaHAzELToN. 

